Pneumatic dental cement-injector.



Ne. 861,270. PATENTED JULY 30, 1907.

H.L.GRUTTENDEN.

PNEUMATIC DENTAL CEMENT INJBUTOR. APPLICATION rum) EOV.19, 1900.

1n: NORRIS PEYER: co.. WASHINGTON, o, c.

Application filed November 19, 1906. Serial No. 343,957.

UNITED STATES PATENT OFFICE.

HENRY L. ORUTTENDEN, OF NORTHFIELD, MINNESOTA.

PNEUMATIC DENTAL CEMENT-INJECTOR.

To all whom it may concern.-

Be it known that I, HENRY L. CRUTTENDEN, a citizen of the United States,residing at Northfield, in the county of Rice and State of Minnesota,have invented certain new and useful Improvements in Pneumatic DentalCement-Injectors; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertainsto make and use thesame.

My present invention has for its especial object to provide an improvedpneumatic dental cement injector adapted for use to force plasticmaterial, such as cement or chlora percha, into nerve canals or otherdeep cavities of teeth, and to this end it consists of the novel devicesand combinations of devices hereinafter described and defined in theclaims.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several views.

Referring to the drawings; Figure 1 is a view principally in sideelevation, but with some parts sectioned, showing the improvedinstrument; and Fig. 2 is a view in elevation showing a portion of theinstrument shown in Fig. 1. v

The improved device comprises a short metal tube 1, having at one end atubular head 2 that extends at an oblique angle thereto and is open atboth ends. Preferably a rubber or other flexible tubeB connects theextended end of the tube 1 to an ordinary pump acting bulb 4. Either endof the tubular head 2 is adapted to be closed by a plug 5 that fits thesame with a slight taper, and is preferably formed with a knurled head.

In connection with the tubular head 2, I employ a cement containing tube6, the large end of which is adapted to telescope under friction ontoeither end of the said tubular head 2, and the other end of which tube 6is provided with a capillary discharge passage formed in an attenuatedneck porton 7. In my prior U. S. Letters Patents 716,677 of date Dec.23rd, 1902, entitled Dental cement injector; and in 749,846 of dateJanuary 19th, 1904, entitled Dental cement injecting tube, I have showncement tubes of a character which I preferably employ in connection withthis improved pneumatic cement injector.

As is evident, the cement or material to be injected into the root orcavity of the tooth, is placed within the Specification of LettersPatent.

Patented July 30, 1907.

tube 6 before the said tube is applied to the tubular head 2. The saidtube 6 being applied to one end of the tubular head 2, the other end ofsaid tubular head is of course closed by the plug 5. By compression onthe bulb 4, a pneumatic pressure will be produced in the tube 6 whichwill eject the cement therefrom into and to the very bottom of thecavity of the tooth being filled. The long and very small neck portion 7of the said tube is adapted to be inserted into very small and very deepcavities. The tubes which I actually use are provided with attenuatedneck portions 7 that are proportionately longer and smaller in diameterthan shown in the drawings. In practice, I prefer to use cementcontaining tubes that are constructed of gela tin, and hence aretransparent so that the amount and condition of the cement within thesaid tubes may always be observed.

In view of the oblique angularity of the tubular head 2 with respect tothe tube 1 (which tube 1 serves as a hand piece), it is possible toreach all cavities'both in upper and lower teeth. To reach some cavitiesthe cement tube 6 should be applied to one end of the head 2 so that itwill stand at an acute angle to the tube 1, as shown in Fig. 2; while toreach other cavities it should be applied to the other end of the head 2so as to stand at an obtuse angle to said tube 1.

The device described has, in practice, been found extremely efiicientand very convenient for the purposes had in view.

What I claim is 1. In a dental cement injector, the combination with atubular head and a pump bulb connected thereto, of a ce merit tubefitting telescopically on said tubularhead, and having an attenuateddischarge neck at its projecting end, substantially as described.

2. In a dental cement injector, the combination with a tube 1 having anobliquely set tubular head 2 that projects and is open at both ends, ofa plug 5 adapted to close either end of said tubular head, a cement tube6 adapted to closely fit upon either end of said tubular head andprovided with an attenuated discharge neck 7, a pump acting bulb, and aflexible tube connecting said bulb to said tube 1, substantially asdescribed.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY L. CRUTTENDEN.

Witnesses:

J. G. SCHMIDT, S. A. UTTLAND.

